The BMS is not designed to stop the charge cycle. The BMS is a safety device, there to protect the battery if something goes wrong at cell level. The charge controller should stop the charge cycle.
Where are you getting that from? Have you actually watched any of Wills videos? Have you watched any of Hobos Videos? Or Lithium Solar?
I really want to know where you are getting that from. The Professionals, Including Will, Hobo, Lithium Solar, DPoz, all whom test and evaluate hardware for a living - THEY ALL USE THE BMS TO STOP THE CHARGE CYCLE!
Look, I realize you are admin and you have a heavy load on your plate, I can't even imagine; but please, Look at this argument I have made, and answer the questions to the points I bring up. Your information
may be outdated...
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It is too early to make any decisions on my final MPPT Parameter settings until I make sure ALL cables are large enough, and triple check all connections, etc. But I already know that the default LFP setting for this MPPT Controller doesn't cut off the voltage when the battery is full, that is handled by the BMS on the Battery. I ran the system in the default settings for the first week and I charged up the system to full, twice. Both times; the BMS turned off the charging cycle, it literally flipped the charge toggle off, and I could not manually turn it back on until the "Charge Voltage Disconnect Release Voltage" was hit. Then it would toggle charging back on. Or allow me to manually toggle it.
I had a non-programmable Renogy Wanderer 30 Amp LFP Version Charge Controller for 2 years and the only way to stop charging was when the batteries BMS would kick in and stop the charging cycle. That was how it was designed to work and it worked great for 2 year.
This new MPPT charge controller has a "LI" setting that is explicitly for LFP and it too works just like the Renogy Wanderer, the only way the charge cycle stops is when the Batteries BMS kicks in.
This new MPPT also has a "USE" setting for User Programable Parameters, but again, there IS not High Voltage Disconnect setting and the only way the charge cycle is stopped is if the batteries BMS stops the charging into the battery.
I do realize a lot of people in the forum are saying the same thing as you, that I shouldn't use the battery BMS to stop charging, but that is literally how its designed to work. I literally have no other way to stop the charge cycle unless I would sit there and manually do it, and you know that is practically impossible.
And then there is the Wall Chargers that I have, designed for LFP, they do not stop sending current and the only way I know my battery is fully charged is when the BMS says 100% and stops the charging.
And, on top of that, all the advertisements around new LFP batteries talk about "Lead Acid Drop In Replacement" meaning these Batteries are designed to work with a wide range of hardware designed for 12v Lead Acid Equipment. Including Lead Acid Chargers, Inverters, etc - these devices cover a wide rang of usage scenarios and parameters, and LFP batteries with internal BMSs are designed with this in mind, meaning the BMS was designed to be used to disconnect the current once the battery is charged. That, and many other conveniences of modern electronics like cell balancing functions, over-current, over-charge, reverse polarity, over-discharge, etc - all these functions are built in and guaranteed by the battery manufacturers.
If they fail, its the manufacturer who will have to cover the replacement costs, at the least. (And I don't want to get into the minutia of fly by night cheap sellers, etc, that is not the point... though it is a consideration)"
Also, I know you have taken measurements of your system before, but can you do it again? it is literally like 10 minutes and everyone wants to make comments and ague, but when I ask for some simple real world data that was virtually demanded of me, no on want to give their data - I do start to wonder... Why are people saying one thing, but not taking the few moments that would be required to say see: my system is operating just like I said... hmmm? BMS can't stop the charge cycle; listen to what I say, I won't give you my data...? ... ... ??? straing... very straing...